Does this solution ever “expire”?

I bought a gallon of it. I certainly hope it doesn't expire! There is no expiration date on the bottle anywhere. I'm pretty sure it's good for at least a year.

Is it safe for reflective coatings?

I just emailed Green Oak to ask if their lens cleaner is "safe to use on lenses coated with anti-reflective coating," and they responded, "Yes, it is safe to use with anti-reflective coatings!"

Can this be used in an ultrasonic cleaner?

Haven't used it that way, so cannot offer guidance.

What is the shelf life for this product? It has taken my family 2 years to use 18 ozs of another vendor's product.

You're going through it faster than I am...

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Description

👓 See the world clearly with Green OakLens!

NO HARSH CHEMICALS - Alcohol and sulfate-free for delicate care.
SAFE FOR ALL LENSES - Perfect for eyeglasses, sunglasses, and camera lenses.
STREAK FREE CLARITY - Protects lenses while ensuring crystal-clear vision.
ECO FRIENDLY FORMULA - Non-toxic, biodegradable, and gentle on skin.
CONVENIENT REFILL SYSTEM - Easily fill 16 bottles with one gallon.

The Green OakLens Cleaner Refill is a professional-grade lens cleaning solution that comes in a generous 1-gallon bottle, designed for easy dispensing into smaller bottles. Its eco-friendly, non-toxic formula ensures safe cleaning for all types of lenses, providing a streak-free finish while protecting against scratches. Ideal for both personal and professional use, this cleaner is free from harmful chemicals, making it a responsible choice for lens care.